after spending a bit of time in ED i can say that there are some things that have improved and some that have not changed and 1 thing that has worsened.
1st the good points.
the overall clarity has improved, i will be trying to tweak my ipd next as sometime between versions the ipd needs to be changed, but the settings in ED have not changed, still running in ULTRA quality and the edges are cleaner and smoother and colours as well as general contrast seems better. the colours pop for me now.. in fact i needed to turn them down a little.
the overall fps has not dipped nor has it gotten better, although each person may find individual differences based on your in game settings so may have a different experience.
the ghosting that has plagued the 4k is still there unfortunately. i was hoping that the combination of this piplay version and latest nvidia drivers would help improve it, sadly no.
now the bad..
there is only 1 worse thing i can see, the distortion when looking up/down 'bends' so for instance when docked in a station and sitting on a landing pad, and i glance up and down the stations structure seems to bend around my vision.
improved brightness/colour - excellent in dark games and those people who struggle with the overall brightness of the hmd. hopefully tweaking the ipd may have some impact on the distortion profile on this version, i will test it tonight and let you know.
UPDATE: just redid my IPD, and it now has been reduced from the previous setting of 62 to 57.5, it has improved the distortion but has not got rid of it completely.